While discussing mortality rates the author argues that it has a lot to do with income, education and occupation of the people; however, the author is over skeptical about the life expectancy as he feels that it may decline. The author puts forward the reason of HIV/AIDS for decline in life expectancy. It is true that it has caused catastrophic gloom in many parts of sub-Saharan Africa but the author seems to be over pessimistic on his assessment. According to him, the communicable diseases will keep the mortality rate always higher because of the aspects such as international air travel, migration and even importation of fruits and vegetables and the reasons put forward by him are certainly not palatable. Medical science has advanced a lot and currently, there are no chances of people dying in bulk as used to happen in the beginning of the nineteenth century when deadly communicable diseases such as plague, tuberculosis, yellow fever and measles destroyed the huge population in a few weeks’ time. With the availability of potent drugs and ever advancing medical sciences, the disease such as AIDS has not been able to cast its deadly shadow on humanity so far. It is a fact that in spite of wars, terrorism, natural calamities, life expectancy is on rise and the author himself has mentioned about it.The author discusses the subject 'Life Span: How Long Could We Live?' That has no relevance to any kind of demographic study that the author has discussed throughout.